Do you think there could be an MBA program that teaches relevant things to what start ups do? and what would it teach?

I feel in some ways part of what Y Combinator does is like an extremely condensed business school that is relevant to start ups.

YC "spend[s] much more time teaching founders how to pitch their startups, and how to close a deal once they've generated interest." YC also invites speakers to share their knowledge http://ycombinator.com/w9speakers.html

I think the ultimate educational experience for a future start up entrepreneur would combine what Ars Digita University taught (programming) http://www.aduni.org/, web design, the relevant aspects of business, a bit of elementary worldly wisdom http://ycombinator.com/munger.html, and to top it all off the school would require the students to work on a start up as a side project.